Wire ageing with the TEA photocathode

Proposal for a Wire Chamber-Based CsI Photocathode for a B-Factory RICH

A design is considered for a CsI photocathode incorporating a proportional wire anode plane. This would have the advantage over the previously considered mesh anode or near wire anode that the anode wires could be moved further away from the cathode pads, allowing position to be determined using interpolation of imaged charge. This would enable comparable or superior position resolution with la...

rookhaven photocathode rf gun

The Brookhaven Accelerator Test Facility (ATF) uses a photocathode rf gun to provide a high-brightness electron beam intended for FEL and laser acceleration experiments. The rf gun consists of 1-,' cells driven at 2856 MHz in 7r-mode with a maximum cathode field of 100 MV/m. To achieve long lifetimes, our photocathode development concentrates on robust metals such as copper, yttrium and samariu...

Asteroseismology with the WIRE satellite

I give a summary of results from the WIRE satellite, which has been used to observe bright stars from 1999–2000 and 2003–2006. The WIRE targets are monitored for up to five weeks with a duty cycle of 30–40%. The aim has been to characterize the flux variation of stars across the Hertzsprung-Russell diagram. I present an overview of the results for solar-like stars, δ Scuti stars, giant stars, a...

Tea hing ASMs , Tea hing with ASMs :

Technology of photocathode production

Thin film photocathodes have been developed both for gas and vacuum based photodetectors. Over the last years we have gained experience in fabricating large area reflective CsI and semi-transparent monoand bialkali-cathodes, i.e. Rb2Te and K2CsSb: Today we are producing stable cathodes with excellent quantum efficiency for large MWPC based pad detectors and Hybrid Photodiodes on a routine basis...